Backrest



FIG. 1 is a perspective view of a first embodiment of a backrest;

FIG. 2 is a front view of the backrest shown in FIG. 1;

FIG. 3 is a rear view of the backrest shown in FIG. 1;

FIG. 4 is a right side view of the backrest shown in FIG. 1;

FIG. 5 is a left side view of the backrest shown in FIG. 1;

FIG. 6 is a top view of the backrest shown in FIG. 1; and,

FIG. 7 is a bottom view of the backrest shown in FIG. 1.

The broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a backrest, as shown and described. 